<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
      label-position="left">
      <div class="title-container">
        <h3 class="title">果园农事信息管理系统</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input ref="username" v-model="loginForm.username" placeholder="用户名" name="username" type="text" tabindex="1"
          auto-complete="on" />
      </el-form-item>

      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input :key="passwordType" ref="password" v-model="loginForm.password" :type="passwordType" placeholder="密码"
            name="password" tabindex="2" auto-complete="on" @keyup.native="checkCaplock" @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin" />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>
      </el-tooltip>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin">
        登录
      </el-button>
    </el-form>
  </div>
</template>

<script>
import { validUsername } from '@/utils/validate';
import { login } from '@/api/user';
import { setToken } from '@/utils/auth';
import router from "@/router";

export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (value.trim() === '') {
        callback(new Error('用户名不能为空'));
      } else {
        callback();
      }
    };
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码不能少于6位'));
      } else {
        callback();
      }
    };
    return {
      loginForm: {
        username: '',
        password: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      passwordType: 'password',
      capsTooltip: false,
      loading: false,
      redirect: undefined,
      otherQuery: {}
    };
  },
  watch: {
    $route: {
      handler: function (route) {
        const query = route.query;
        if (query) {
          this.redirect = query.redirect;
          this.otherQuery = this.getOtherQuery(query);
        }
      },
      immediate: true
    }
  },
  created() {
    // window.addEventListener('storage', this.afterQRScan);
  },
  mounted() {
    if (this.loginForm.username === '') {
      this.$refs.username.focus();
    } else if (this.loginForm.password === '') {
      this.$refs.password.focus();
    }
  },
  destroyed() {
    // window.removeEventListener('storage', this.afterQRScan);
  },
  methods: {
    checkCaplock(e) {
      const { key } = e;
      this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z');
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = '';
      } else {
        this.passwordType = 'password';
      }
      this.$nextTick(() => {
        this.$refs.password.focus();
      });
    },
     handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    getOtherQuery(query) {
      return Object.keys(query).reduce((acc, cur) => {
        if (cur !== 'redirect') {
          acc[cur] = query[cur];
        }
        return acc;
      }, {});
    }
  }
};
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/953 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  background-image: url('~@/assets/background.jpg');
  /* 设置背景图片 */
  background-size: cover;
  /* 使背景图片覆盖整个容器 */
  background-position: center;
  /* 居中显示背景图片 */
  background-repeat: no-repeat;
  /* 不重复背景图片 */
  min-height: 100%;
  width: 100%;
  overflow: hidden;

  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100vh;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.1);
    /* 半透明背景 */
    border-radius: 10px;
    /* 圆角 */
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.5);
    /* 阴影效果 */
    backdrop-filter: blur(10px);
    /* 模糊背景 */
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: #ffffff;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      /* 文字阴影 */
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .el-button--primary {
    background-color: #4caf50;
    /* 绿色按钮 */
    border-color: #4caf50;
    /* 绿色边框 */
    transition: background-color 0.3s, border-color 0.3s;

    &:hover {
      background-color: #45a049;
      /* 悬停时颜色加深 */
      border-color: #45a049;
    }
  }

  .el-input__inner {
    background-color: rgba(255, 255, 255, 0.1);
    /* 输入框半透明背景 */
    border-color: rgba(255, 255, 255, 0.3);
    /* 输入框边框颜色 */
    color: #ffffff;
    /* 输入框文字颜色 */
    transition: background-color 0.3s, border-color 0.3s;

    &:focus {
      background-color: rgba(255, 255, 255, 0.2);
      /* 焦点时颜色加深 */
      border-color: #4caf50;
      /* 焦点时边框颜色 */
    }
  }

  .el-form-item__content {
    position: relative;
  }
}</style>